| 摘要 |
A soft switch in a BcN(Broadband convergence Network) and a call session auditing method thereof are provided to match call session state information between a soft switch and each gateway by providing an audit function for POTS(Plain Old Telephone Service) call sessions. If a soft switch activates a call session state information audit function(S2), a calling-side call control block requests audit information from a calling-side gateway and acquires it(S4). The call control block obtains a context ID from the calling-side gateway, requests audit information from a called-side call control block, and acquires it(S6). The calling-side call control block requests audit information from a subscriber DB of the soft switch and acquires it(S8). Based on the acquired audit information, the calling-side call control block judges whether the calling-side gateway, the called-side call control block, and the subscriber DB have the same state information with respect to an identical call session(S10). If not, the calling-side call control block initializes state information of the call session for the calling-side gateway, the called-side call control block, and the subscriber DB(S12).
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